Q–I bought a new set of top quality drill bits for my electric drill to make holes in metal.
However, I find that whenever I want to drill a hole through a smooth metal surface, the tip of the bit “wanders” or skitters around before it gets started, making it very difficult to form the hole exactly where I want to. What do you think I am doing wrong?
A–A drill bit “wandering” before it gets started is not an unusual problem.
To prevent this, use a variable speed drill running at a low speed and start by first using a center punch to make a slight dimple in the metal where you want the bit to start.
Then build a small “dam” around this dimple, using a ring of putty or glazing compound, and fill this with a small amount of kerosene or light lubricating oil before starting to drill. The lubricant will help the bit cut faster and cooler.
Another tip: Before using a bit larger than 1/4 inch, start by first drilling a smaller hole, then finish with the larger bit.
Q–My fireplace hearth is made of marble, and I have been told that this stains easily. Is there a sealer you can suggest that can protect the marble against such staining?
A–The coating most frequently used on marble is a good grade of white or clear paste wax that is rubbed on, then buffed vigorously to produce a shine.
There is also a variety of stone sealers for use on marble, usually sold in home centers and by local marble or stone dealers.
Q–Our kitchen sink has a garbage disposal unit under it, and there is a foul odor coming from this drain.
Short of replacing the disposal unit, what can I do to get rid of this smell?
A–Many markets and hardware stores sell special cleaners and deodorants for use in garbage disposals.
Another household remedy that often works is to pour vinegar into the drain and let it sit for about 30 minutes before flushing it down with running water.
A cupful of household bleach mixed half and half with water poured into the disposal also is claimed to work, but flush this away with water after about 10 minutes.
Q–Our old bedroom furniture is finished with mahogany veneer and this thin veneer has a blister on the top. Can it be repaired without completely refinishing the dresser?
A–Slice through the blister with a razor blade, then press one side of the blister down and slide the tip of a thin knife blade under the raised half.
Use the tip of the blade to scrape out as much of the old dried glue as you can, then press this half of the blister down and do the same under the other half. When finished, use a toothpick or thin blade to spread a small amount of white carpenter’s glue under each raised half of the blister.
Press down firmly on the whole blister and wipe off any excess glue that oozes out.
Cover the area with waxed paper, then pile some books or magazines on top to hold the veneer down until the glue has dried.
———-
Have a question about home repair? Write to Bernard Gladstone in care of Your Place, Chicago Tribune, 435 N. Michigan Ave., Chicago, IL 60611. Sorry, letters cannot be answered personally.
